i have a 2007 ford f-150 4x4 xlt. i'm not getting fuel to the fuel rail. i have changed the fuel filter, fuel pump sending unit, and ftp sensor, fuel pump driver module. still nothing and i'm tired of throughing parts at it please help.
No fuel at all or no pressure? If no fuel pressure check for a faulty pressure regulator by hooking up your pressure gauge, with pliers clamp the soft fuel line after the pressure regulator. If you have pressure, than the pressure regulator is no good. If no fuel at all, along with no pressure, than you need to go back to fuel pump to varify its coming on.
Fuel pump is not coming on.
You need the wiring diagram, which ever end is easier to check. Fuel pump or fuel pump relay. Verify voltage with key on to the fuel pump, (note: that vottage will only be present for a couple of seconds than shut off) have someone turn the key on while your checking voltage. No voltage at pump, check fuel pump relay, check your wiring diagram to see which wire from the ignition switch feeds the relay. If you have voltage feed from the ignition switch to the relay, see if relay is turning on by checking voltage coming out of the relay to the pump. You need to refer to your wiring diagram to see which colors each wire is.
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